BIOL 201 Lecture Notes - Lecture 4: Gamete, Zygosity, Polyploid
23 Apr 2018
School
Department
Course
Professor
Document Summary
Plant like organisms but like true roots, stems or leaves. Warm and cool mostly marine waters, often relatively deep. Marine algal diversity is dominated by reds (green algae in freshwater) Chlorophyll a (same as cyanobacteria) not advanced. They reproduce regularly asexually (diploid organisms produce spores and those spores go off to the environment and germinate and produce more) Gametophyte/sporophyte can be isomorphic (same shape) and heteromorphic (different shape) Carposporophyte is produced from a zygote and either it can release spores which go back on the female gametophyte and produce more carposporophyte or the spores can go into the environment to produce an additional plant called a tetrasporophyte. We might have had two haploid cells and if they fused it would be a diploid. How has sporic meiosis evolved? organism, then for some reason, there was some selection pressure to generate a multicellular organism. Increase the number of gametes, arising from zygote if its multicellularity results in multiple cells undergoing meiosis.
